I have a 2HP (yea I know its a peak rating) Campbell Hausfeld, bought it 5 years ago. It is oiless and is quite portable and easy to move.
Everyone I spoke with said they were junk and I shouldn't waste my money. To date it has 1000 hrs on it and all of that time has been in my shed where is has been rained on and run in -40C weather in the winter.
The only mod I made was to put an industrial sized water separator on it, it has performed flawlessly and has never blown my 15A breaker once. It still pumps up to 130PSI and with the 100ft hose I run into the house I use it all the time for air brushing models and using a blow gun to clean electronics etc.
I paid $150 CDN for it and since it has not required one minute of my attention I consider it a great buy. The only real issue is it is extremely noisy, I have considered making a little insulated doghouse for it with an external switch and an external hose reel.
If this thing ever wears out I will buy another immediately to replace it, it has filled more tires and popped more beads and painted more toys/models than I care to mention...I've also dragged it across more gravel driveways and stuck it my trunk dozens of times to the racetrack (where 120VAC 15A service is all you get in the pits).
Worth every penny I say, here is a pic of the 2009 model...mine is minus the fancy shrouds and front wheels but is mechanically the same.